气候变化领域集成服务门户(CCPortal): A Census of the Warm-Core Rings of the Gulf Stream: 1980

CCPortal

DOI	10.1029/2019JC016033
	A Census of the Warm-Core Rings of the Gulf Stream: 1980–2017
	Gangopadhyay A.; Gawarkiewicz G.; Silva E.N.S.; Silver A.M.; Monim M.; Clark J.
发表日期	2020
ISSN	21699275
卷号	125 期号:8
英文摘要	A census of Gulf Stream (GS) warm-core rings (WCRs) is presented based on 38 years (1980–2017) of data. The census documents formation and demise times and locations, and formation size for all 961 WCRs formed in the study period that live for a week or more. A clear regime shift was observed around the Year 2000 and was reported by a subset of authors (Gangopadhyay et al., 2019, https://doi.org/10.1038/s41598-019-48661-9). The WCR formation over the whole region (75–55°W) increased from an average of 18 per year during Regime 1 (1980–1999) to 33 per year during Regime 2 (2000–2017). For geographic analysis formation locations were grouped in four 5° zones between 75°W and 55°W. Seasonally, WCR formations show a significant summer maxima and winter minima, a pattern that is consistent through all zones and both temporal regimes. The lifespan and size distribution show progressively more rings with higher longevity and greater size when formed to the east of 70°W. The average lifespan of the WCRs in all four zones decreased by 20–40% depending on zones and/or seasons from Regime 1 to Regime 2, while the size distribution remained unchanged across regimes. The ring footprint index, a first-order signature of impact of the WCRs on the slope, increased significantly (26–90%) for all zones from Regime 1 to Regime 2, with the highest percent increase in Zone 2 (70–65°W). This observational study establishes critical statistical and dynamical benchmarks for validating numerical models and highlights the need for further dynamical understanding of the GS-ring formation processes. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Gulf Stream; Lifespan of rings; Regime-Shift; Ring Census; size of rings; Warm Core Rings
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186761
作者单位	School for Marine Science and Technology, University of Massachusetts Dartmouth, Dartmouth, MA, United States; Woods Hole Oceanographic Institution, Woods Hole, MA, United States; RPS Group, South Kingstown, RI, United States; Jenifer Clark's Gulfstream, Dunkirk, MD, United States
推荐引用方式 GB/T 7714	Gangopadhyay A.,Gawarkiewicz G.,Silva E.N.S.,等. A Census of the Warm-Core Rings of the Gulf Stream: 1980–2017[J],2020,125(8).
APA	Gangopadhyay A.,Gawarkiewicz G.,Silva E.N.S.,Silver A.M.,Monim M.,&Clark J..(2020).A Census of the Warm-Core Rings of the Gulf Stream: 1980–2017.Journal of Geophysical Research: Oceans,125(8).
MLA	Gangopadhyay A.,et al."A Census of the Warm-Core Rings of the Gulf Stream: 1980–2017".Journal of Geophysical Research: Oceans 125.8(2020).